50 



The Rorists' Review 



JANOABY 6, 1921 



The VALENTINE BOX 



THAT WILL CONVERT YOUR 



FLOWERS FROM AN ORDINARY 



BOUQUET TO A— 



Real Valentine 



A white glazed folding box of won- 

 derful quality. Printed in red and 

 gold with heart and arrow embossed 



INEXPENSIVE PR ACTICAL 



BEAUTIFUL 



Valentine Day promises to be the best in the his- 

 tory of the florists' trade. The demand for boxes 

 will be greater than the supply. Order yours 

 today. All orders taken subject to stock unsold. 



Five Sizes: 



Per 100 Ker 100 



10x«x54 $12.00 21x5x3 $11.00 



1-2x8x54 14,00 24x5x34 13.00 



24x8x4 17.00 



WRITE FOR PRICES ON OUR STANDARD LINE OF FLORISTS' BOXES 



Duro Paper Products Company 



729-735 S. Wabash Ave., CHICAGO. 



New York Office: 1204 BROADWAY 



year in the asexual stage, as is true on 

 roses grown under glass where the tem- 

 perature does not fall sufficiently low 

 to kill the spores and mycelium. 



There are, then, two and possibly 

 three sources of primary infection in 

 the spring. First and of primary im- 

 portance is the production of ascospores, 

 which live over winter in perithecia on 

 plants grown outdoors. These spores 

 are distributed by the wind, rain, man 

 and other agents and, under proper 

 conditions of temperature, moisture and 

 position, germinate and produce infec- 

 tion. The second source of inoculum for 

 roses in the open is the distribution of 

 asexual spores formed throughout the 

 year on roses under glass. These spores 

 are light and might readily be carried 

 by the wind for great distances. Grow- 

 ers frequently buy pot-grown roses in 

 the spring to plant in their gardens. 

 Some of these plants may be affected 

 and often the fungus spreads quickly 

 to other bushes. The third possible 

 source of inoculum is the production of 

 conidia by mycelium which has over- 

 wintered on plants in the open. Some 

 doubt exists, as already stated, as to 

 whether or not the mycelium is peren- 

 nial in sections having relatively cold 

 winters. 



Spores, then, eitlier ascospores or sum- 

 mer spores, are carried to rose plants in 

 the sjiring, where, under proper condi- 

 tions, they germinate. The germ-tube 

 coming from the spore quickly elongates, 

 branches and soon establishes a food re- 

 lation with the host by sending haus- 

 toria into the epidermal cells. Soon 

 thousands of new spores are produced, 

 which, when mature, are carried by the 

 slightest air currents to other parts of 

 the plant and to other bushes. 



TjGautj pcsGrvcd'-' 

 TrofTts assured^ 

 use yloGKler 

 JlcfriaGraiors for 

 cut flowers 



Bernard Glockler Gd 



I Pittsburgh, Pa. x 



Many florists believe that rose mil- 

 dew is caused by drafts, having noticed 

 the initial appearance of the disease in 

 the areas in the greenhouse near doors 

 or broken panes of glass. Needless to 

 say, mildew cannot develop without the 

 presence of the fungus, the drafts serv- 

 ing as bearers of spores and possibly 

 bringing about favorable conditions for 

 infection, cither by its effect on the host 

 or on the fungus, or on both. 



The efficiency of sulphur fungicidei 

 for the control of rose mildew haa long 

 been recognized. Lime-sulphur and 

 other liquid sprays are more or less ef- 



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fective, but, owing to the time and la- 

 bor involved in applying spray solutioM 

 and to the unsightliness brought about 

 by their use, an efficient dust mixture 

 is preferable. Stewart reports good 

 control of rose mildew by the uso of ft 



